Diaphragm structure



Sept. 8, 1925. 1,552,958

f H. G. SAAL DIAPHRAGM STRUCTURE Filfed March' 2o, 1925 A Qm Q. 4 wi i; .3 '11.

Patented Sept. 8, 1925.

UNITED STATES HENRY G'. SAAI, OF CHICAGO, ILLINOIS.

DIAPHRAGM STRUCTURE.

Application filed March 20, 1925. Serial No. 17,080.

T0 all Iwhom t may concern.'

Be it known that I, HENRY G. SAAL, a citizen of the United States, residing at Chicago, in the county of Cook and the State of Illinois, have invented a certain new and useful Improvement in Diaphragm Structures, of which the following is a full, clear, concise., and eXact description.

My invention relatesto instrumentalities employing diaphragme, such as telephones, and has for its obj ect the provision of means whereby the diaphragms may be clamped in place by rotatable clamping members that are enabled to perform their function without imparting any distorting turning effort to the diaphragms. In carrying out my. invention a nonrotating guard is interposed between the diaphragm and rotatable clamping member, this guard preventing said clamping member. from exerting material turning effort upon the diaphragm which is thus guarded from distortion.

The invention will be more fully explained in connection with the accompanying drawing showing the preferre embodiment thereof as applied to telephone receivers. In the drawing Fig. 1 is a longitudinal sectional view of such a telephone Vreceiven taken on line 1--1 of Fig. 2, with parts shown in elevation and parts broken away; Fig. 2 is a sectional View on line 2-2 of Fig. 1; Fig. 3 is a sectional view on line 3-3 of Fig. 2; Fig. 4 is a sectional View on line 4 4: of Fig. 2; and Fig. 5 is a perspective view showing -a diaphragm supporting cup and a guard ring in separated relation.

Like partsare indicated by a similar characters of reference throughout the different figures.

The circular diaphragm 1 may be of any suitable sheet material such as mica or Steel. A cup 2 carries the-peripheral portion of the dlaphragm upon its rim. A casing is shown which comprises a body member 3, made of gutta percha, and a rotatable cap 4t, of similar or suitable material threaded upon the ,body member, the rim portions of said diaghragm and cup being interposed between the body member and cap of the casing. A guard ring 5 is interposed between the cap and the peripheral portion of the diaphragm, said cap having an annular ridge 6 engaging said ring which is coaxial withthe ridge and cup rim. Therim por- -lation with the diaphragm, as through a stylus 10 which connects the diaphragm and the armature 11 of the electromagnet 9 of the magnet system.

It is obvious that changes may be made without departing from the spirit of my invention.

Having thus described my invention I claim as new and desire to secure by Letters Patent the following 1. The combination with a diaphragm support; of a rotatable clamping member in threaded connection Vwith said support; a diaphragm interposed between said support and clamping member; and a guard clamped between said clamping member and diaphargm and held from rotation by said support.

2. The combination with a support having an annular diphragm seat; of a rotatable clamping member in threaded connection with said support and havingv an annular ridge facing and substantially coaxial with said diaphragm seat; a circular diaphragm whose edge dportion is interposed between said seat an ridge; and a guard ring clamped between and substantially coaxial with said seat and ridge and held from rotation by said support.

' 3. The combination with a circular diaphra m; of a cup upon whose rim` the perip eral portion of the diaphragm 1s seated; a casing comprising a bodymember and a rotatable cap threaded upon the body member, the rim portions of said diaphragm and cup being interposed between the body member and cap of said casing; and a guard ring interposed between the cap and the peripheral portion of the diaphragm, said cap having an annular ridge enga-ging said ring, the rim portions of said cup and ring having engaging holding forma-tions to prevent the ring from turning materially as the cap is turned.

4. The combination with a circular diaphragm; of a cup upon whose rim the peripheral portion of the diaphragm is seated; a casing comprising a ody member and a rotatable cap threaded upon the body member, the rim portions of said diaphragm and cup being inter osed between the body member and cap o said casing; and a guard ring interposed between the cap and the peripheral portion of the diaphragm; said cap having an annular ridge engaging said ring, the rim ortions `of said cup and ring having engaging groove and tongue holding formations to prevent the ring from turning materially as the cap is turned.

5. The combination with a circular diaphragm; of a cup upon whose rim the peripheral portion of the diaphragm is seated; a casing com rising a body member and a rotatable cap t readed upon the body member, the rim portion of said diaphragm and cup being interposed between the body member and cap of said casing; and a guard .ring interposed between the cap and the perl heral portion of the diaphragm, said cap aving an annular rldge engaging said ring, the rim portions of said cup and ring having engaging groove and tongue holding formations to prevent the ring from turning materially as the cap is turned.

6. The combination with a diaphragm support; of a rotatable clamping member in threaded connection with said su port; a diaphragm interposed between sai support and clamping member; and a. guard clamped between said clamping member and diaphragm and held from rotatioi.

7 The combination with a support having an annular dia hragm seat; of a rotatable clamping member in threaded connection with said support and having an annular rid e facing and substantially coaxial with sai diaphragm seat; a circular dia hragin whose edge portion is interposed Eetween said seat and ridge; and a guard ring clamped between and substantially coaxial with said seat and ridge and held from rotation.

In witness whereof, I hereunto subscribe my name. l

HENRY G. SAAL. 

